Step 22 of 22
Apps & interfaces
Chat front ends, app builders and finished products for end users. Sometimes the right answer is to buy, not build. A good interface is what people actually judge.
How to choose
- Internal chat over your models: a self-hosted chat UI.
- A product prototype: an AI app builder.
- A standard job (support, coding, writing): a reviewed product may beat building your own.
What to look for
The questions that separate the options, in order of how much they matter.
01
Who signs in: auth, SSO and roles
A tool for one person needs no login; a portal for a company needs single sign-on, groups and permissions, and an audit trail. Open WebUI offers LDAP and SCIM with user groups; LibreChat supports OAuth, OpenID and LDAP. Langflow's open-source edition has no SSO or role-based access, and Dify keeps SSO for its enterprise tier. Check this first, because it rules options out faster than any feature list.
02
Many models through one interface
Most teams want local models and several cloud providers side by side, and the freedom to switch when prices or quality change. The chat UIs here connect to any OpenAI-compatible endpoint, which covers Ollama, vLLM and most hosted providers; LibreChat also has native Anthropic, Google, Bedrock and Azure connections. Check whether admins can restrict which models each group sees and track usage per user.
03
Built-in document search (RAG)
Chatting over your own files is the most common request after plain chat. AnythingLLM ships its own vector database and embedder, so a folder of PDFs becomes a chatbot with nothing else to install; Open WebUI and LibreChat include file search; Dify and Langflow let you build full retrieval pipelines. Built-in RAG is fine for a team's documents. For large or changing corpora, a dedicated pipeline gives you more control over chunking and retrieval quality.
04
Tools, plugins and MCP
Connecting the assistant to other systems is what turns a chat window into a work tool. MCP (Model Context Protocol) is now the common standard: Open WebUI, LibreChat, AnythingLLM, LobeHub, Jan and Cherry Studio all support MCP servers, and Langflow flows can act as both MCP clients and servers. Check how tool permissions are granted and who can add a server, since a tool that can act can also leak data.
05
Licence terms if you rebrand or resell
Several popular projects are not plain open source. Open WebUI forbids removing its branding above 50 users without an enterprise licence; LobeHub and Dify use modified Apache licences that restrict modified or multi-tenant commercial use; Cherry Studio is AGPL-3.0. LibreChat, Langflow, AnythingLLM and Jan are MIT or Apache 2.0. Internal use is fine with all of them; read the licence before putting one in front of customers.
06
Operations and security of a self-hosted app
Self-hosting means you patch it. Dify and LibreChat need several services such as databases and search engines; Open WebUI is a single container but moves fast. Langflow had serious 2026 incidents in which unpatched public instances were compromised within a day, so put any of these behind authentication and keep them updated.
07
AI app builders: code ownership and cost predictability
Builders such as v0, Bolt.new and Replit produce a working app from a prompt. Check whether you get normal code you can take elsewhere, which stack it locks you into (v0 is React and Next.js on Vercel), and how usage is billed. Token- and effort-based billing makes monthly costs hard to predict; reviews of Bolt and Replit both centre on surprise bills.
How the options differ
Four families sit here. Self-hosted chat UIs (Open WebUI, LibreChat, LobeHub, AnythingLLM's Docker server) give a team one ChatGPT-style portal over local and cloud models, with sign-in, document search and tools; Open WebUI has the deepest admin controls, LibreChat the cleanest licence. Desktop apps (Jan, Cherry Studio, AnythingLLM Desktop) are single-user: Jan runs open models locally through llama.cpp, Cherry Studio is a front end for many providers and needs a separate server for local models.
Low-code builders (Dify, Langflow) let you assemble agents, workflows and RAG pipelines on a canvas and publish them as an app or API; Dify suits business teams, Langflow developers who want editable Python and an MIT licence. AI app builders (v0, Bolt.new, Replit) are hosted products that write and deploy a whole web application from a prompt; they build the product around the AI rather than give you an interface to a model.
11 tools, compared
Ranked by our rating. Open any review for sources, prices and the full verdict.
| Tool | Rating | Our verdict | Best for | Price |
|---|---|---|---|---|
| Open WebUIrepo | 4.6/5 | A self-hosted chat portal with admin controls most paid products lack, from a project that published 159 security advisories in 2026 alone. | Teams that want a private, multi-user chat portal over local and cloud models. | Free to self-host at any scale with the branding intact. White-labelling above 50 users, and the Terminals add-on, need an enterprise licence priced per seat; prices are not published. |
| Difyrepo | 4.5/5 | Dify gives business teams a complete LLM app builder they can edit themselves, on a licence that only bites when you resell it as a hosted service. | Teams building internal chatbots and RAG apps that non-engineers will maintain. | Self-hosted Community Edition free (modified Apache 2.0, one workspace). Dify Cloud: Sandbox free (200 one-time message credits), Professional $590/workspace/year, Team $1,590/workspace/year (annual billing, which Dify says saves 17%), Enterprise by quote. |
| LibreChatrepo | 4.4/5 | A permissively licensed company chat portal with serious agent and MCP features, provided someone on staff is happy to own a YAML file and a MongoDB. | Companies that want a rebrandable internal ChatGPT alternative across many providers. | Free and open source (MIT). No paid tier; you pay your model providers and hosting. |
| Replittool | 4.4/5 | Replit is the app builder to choose when the app has to stay up afterwards, as long as someone owns the usage dashboard. | Founders and developers who want to build, host and keep running a full-stack app in one place. | Starter free (daily Agent credits, 1 published app for 30 days); Core $20/month ($18 yearly) with $20 credit; Pro $100/month ($90 yearly) with $100 credit; Enterprise custom. Extra Agent work, hosting and databases are billed by usage. |
| AnythingLLMrepo | 4.3/5 | AnythingLLM is the shortest path from a folder of PDFs to a private chatbot, but 25 security advisories argue for keeping its server edition behind a login and a VPN. | Individuals and small teams who want private chat over their own documents. | Desktop and Docker free (MIT); an optional Desktop Pro subscription lifts daily limits on its Magic features (price not published in the docs). Hosted Cloud Basic $50/month, Pro $99/month; Enterprise custom. |
| v0tool | 4.3/5 | v0 writes the cleanest React front ends of any AI builder, and Vercel charges $70 a seat extra for the privilege of keeping your code out of training. | Front-end developers and design-minded product teams building React or Next.js apps that deploy on Vercel. | Free: 7 messages/day; Plus $30/user/month ($30 monthly credits + $2/day); Business $100/user/month (same credits, training opt-out by default); Enterprise custom with SAML SSO. Tokens from $0.20/$1.20 (v0 Mini) to $10/$50 (v0 Max Fast) per 1M. |
| Janrepo | 4.2/5 | A fully open, account-free desktop home for local models that has quietly grown into an agent, so its defaults now matter more than its looks. | Privacy-minded individuals who want to run open models offline in a desktop app. | Free and open source (Apache 2.0). No paid tier; cloud models use your own API keys. |
| LobeHub (formerly LobeChat)repo | 4.1/5 | Better looking than any open-source rival, but a licence that bars modified redistribution and a long run of serious advisories make it a riskier server to expose than LibreChat or Open WebUI. | Individuals and small teams who want an attractive multi-model chat and agent app. | Self-hosting free under the LobeHub Community License. LobeHub Cloud: Free; Starter $12.90/month ($9.90 billed yearly); Premium $24.90 ($19.90 yearly); Ultimate $49.90 ($39.90 yearly). Enterprise Edition by quote. |
| Cherry Studiorepo | 4.1/5 | A capable personal AI workstation for people with many API keys, whose security history makes prompt updating non-negotiable. | Power users who work across many AI providers from one desktop app. | Community Edition free under AGPL-3.0. Cherry Cloud managed models and the Enterprise edition are not publicly priced. |
| Langflowrepo | 3.8/5 | Langflow is the most capable fully MIT visual agent builder left standing, and also one of the most attacked, so treat every instance as something to patch weekly and never expose directly. | Developers prototyping agents and RAG pipelines who want a visual editor and a permissive licence. | Free and open source (MIT). No official hosted cloud since April 2026; the enterprise route is through IBM, with no published price. |
| Bolt.newtool | 3.8/5 | Bolt gets a working web app on screen faster than almost anything, then bills you more for every fix as the project grows. | Developers and technical founders who want a quick, editable full-stack prototype in the browser. | Free: 300K tokens/day, 1M/month; Lite $9/month (Forge only, waitlist); Pro $18/month annual or about $25 monthly, from 10M tokens; Teams $27/member/month annual ($30 monthly); Enterprise custom. |
Side by side
The specifications that matter for this step. Checked 2026-10-19; confirm on the vendor’s site before you commit.
| Tool | Type | Hosting | Auth / SSO | RAG built in | MCP support | Licence |
|---|---|---|---|---|---|---|
| Open WebUI | Self-hosted chat UI | Self-host (Docker) | LDAP, SCIM, user groups | Yes | Yes, plus OpenAPI tools | BSD-3 plus branding clause |
| Dify | Low-code builder | Self-host or Dify Cloud | SSO on Enterprise only | Yes (knowledge base) | Not published | Modified Apache 2.0 |
| LibreChat | Self-hosted chat UI | Self-host (needs MongoDB) | OAuth, OpenID, LDAP | Yes (file search) | Yes | MIT |
| Replit | AI app builder | Hosted (Replit cloud) | Not published | Not applicable | Not published | Proprietary |
| AnythingLLM | Desktop app + team server | Desktop, Docker or hosted | Users and permissions (Docker) | Yes, own vector DB | Yes | MIT |
| v0 | AI app builder | Hosted (Vercel) | SSO on Enterprise | Not applicable | Not published | Proprietary |
| Jan | Desktop app, local models | Desktop | Single user | Limited | Yes | Apache 2.0 |
| LobeHub (formerly LobeChat) | Chat and agent app | Self-host, desktop or cloud | Not published | Yes (knowledge bases) | Yes | Modified Apache 2.0 |
| Cherry Studio | Desktop app, many providers | Desktop | Single user | Yes (knowledge base) | Yes | AGPL-3.0 |
| Langflow | Low-code builder | Self-host or desktop | No SSO or RBAC (open source) | Build your own pipeline | Client and server | MIT |
| Bolt.new | AI app builder | Hosted (StackBlitz) | Not published | Not applicable | Not published | Proprietary |
Head to head and ranked guides
Where this stage fits
- Chat with your documents: we would start with Open WebUI.
- Customer support agent: we would start with Intercom Fin, Sierra.
- Coding agent: we would start with Claude Code, Cursor.
- Research & knowledge graph: we would start with AnythingLLM.
- Assistant with long-term memory: we would start with LibreChat.
- Image generation pipeline: we would start with ComfyUI.
- Video production: we would start with Runway, Google Flow.
- Private, on-device AI: we would start with Jan, Open WebUI.
- Workflow automation: we would start with Zapier, Make.